- Saurischia, order Saurischia - extinct terrestrial reptiles: theropods (carnivorous); sauropods (herbivorous)
--1 is a kind of animal order
--1 is a member of Archosauria, subclass Archosauria
--1 has members:saurischian, saurischian dinosaur; Sauropodomorpha, suborder Sauropodomorpha